The remnants of supernovae, and the nebulae inflated by pulsars, offer the opportunity to learn about the progenitors and mechanisms of supernovae and the nature of nonrelativistic and relativistic shock waves. In particular, hard X-ray observations provide information on particle acceleration at the blast waves of young shell remnants and at the pulsar wind termination shocks of pulsar-wind nebulae, as well as on the radioactive titanium synthesized in supernova explosions. New X-ray information from the Chandra X-ray Observatory and in particular from the NuSTAR mission has led to significant advances in our understanding of young supernova remnants and pulsar-wind nebulae. I shall summarize recent observations, and some of the theoretical deductions that can be made from them.
Followed by wine and cheese in Pupin 1402.